Sun/partial shade; deciduous and thicket-forming. Spectacular scarlet and orange color in autumn, hence the name. Very high heat tolerance.
In landscape settings, mass or pair with native evergreens (like evergreen sumac) to form screens.
Despite the name, neither flameleaf nor evergreen sumac are poisonous. “Poison sumac” (Toxicodendron vernix) is a shrub of Southern swamps and doesn’t occur much in Texas west of the Big Thicket.